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Old 05-19-2014, 03:17 PM   #1
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Tire pressure says 80psi

Am I reading the tire correctly? I have a 2005 Cruiser 28ft TT and the tires say max pressure when cold 80 psi. That sounds really high. When I checked the 4 tires, they were all set at 60psi. We bought this used last October and are taking our first trip this Thursday. Thanks
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Old 05-19-2014, 03:21 PM   #2
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What size tires are on it? If they are E rated I believe it.
Somebody more then likely changed out the stock tires if that's the case.
Hopefully they changed the rims at the same time.
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Old 05-19-2014, 03:45 PM   #3
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I have an 08 with 15 d rated 65 psi should be a label on the front drivers side with the tire pressure info
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Old 05-19-2014, 04:48 PM   #4
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I just went out and looked. They look really new to me and it does say Rated "E" and max cold inflation is 80 psi. Should I do it that high or stay with 60 or 65psi? They are 15 inch tires. Thanks again
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Old 05-19-2014, 06:17 PM   #5
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I have e rated tires on my PP and the max pressure cold is 80 psi. When I am on a trip they are pumped to 80 on both the trailer and the truck. The side panel on the truck recommends a lower pressure but have had no problems with them at 80. Now that being said temperature changes pressure the most. I am guessing 80psi at 60 degrees so I would be sure to check them first thing in the morning when it is the coolest.
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Old 05-19-2014, 07:26 PM   #6
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I just went out and looked. They look really new to me and it does say Rated "E" and max cold inflation is 80 psi. Should I do it that high or stay with 60 or 65psi? They are 15 inch tires. Thanks again

What does your trailer weigh? I can't believe you will be any where close to the max on those tires.
You should also crawl under it and see what is stamped on your rims for pressure rating. If they aren't 80# rims I sure wouldn't pump the tires up to 80#.
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Old 05-19-2014, 07:37 PM   #7
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my cruiser weighs 5800 lbs
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Old 05-19-2014, 07:44 PM   #8
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If that's all you weigh, I think the 60 to65# is right.
Mine weighs between 6500 and 7000 and I run 65# in my 15 in. E rated tires.
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Old 05-19-2014, 08:52 PM   #9
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What does your trailer weigh? I can't believe you will be any where close to the max on those tires.
You should also crawl under it and see what is stamped on your rims for pressure rating. If they aren't 80# rims I sure wouldn't pump the tires up to 80#.
Lloyd is right. While Load Range E tires should be run at 80 psi for best wear and less heating, if the rims are not rated for 80 psi, it could be dangerous to run them that high. If you do find that the rims will take it, I would run them at 75 to 80 psi. Underinflation is one of the leading causes of premature tire failure.
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Old 05-19-2014, 09:59 PM   #10
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If that's all you weigh, I think the 60 to65# is right.
Mine weighs between 6500 and 7000 and I run 65# in my 15 in. E rated tires.
Dry weight for a CF26RK is 6600. When you have all your stuff in the trailer ready to go it will be much heavier. Put it on the scales someday and I suspect you will be in for a surprise.
My 2010 CF26RK runs about 10,145 when the wife has everything she wants loaded and I have the propane tanks and fresh water tank full.

Each axle runs 3940 which runs close for D rated tires. Have a flat and the other tire is then grossly overloaded.

That is why I went with E tires at 80 psi.
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Old 05-20-2014, 08:01 AM   #11
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I just crawled under and saw this under each rim: 11 11 02 1505 JCRC DOT USA T 15x5 J. You're right about dry weight of 5800 lbs. The awning and propane tanks probably add another 300 lbs or so. (plus clothes and other things). What can I decipher from these numbers? Still don't know what rims are rated for. Thanks
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Old 05-20-2014, 08:03 AM   #12
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Dry weight for a CF26RK is 6600. When you have all your stuff in the trailer ready to go it will be much heavier. Put it on the scales someday and I suspect you will be in for a surprise.
My 2010 CF26RK runs about 10,145 when the wife has everything she wants loaded and I have the propane tanks and fresh water tank full.

Each axle runs 3940 which runs close for D rated tires. Have a flat and the other tire is then grossly overloaded.

That is why I went with E tires at 80 psi.

I didn't look at my scale records close enough before posting.
My mistake.
Truck and camper---14760#
truck off the scale, camper weight, 6460#
Truck alone ---6400# hitch, full gas tank and me.
so the camper that day weighed,---8360#
I guess my axles must weigh in at 3230# each, rest would be pin weight if I figured that right.
If you have 3940 per axle, you must have it pretty heavy on the pin.
Your rig weighs approx. 1800# more then mine.
My wife must not pack as heavy as yours.
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Old 05-20-2014, 08:09 AM   #13
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If you have a local tire shop, ask them what those numbers mean.
That way you should be getting the correct info.
My guess is the first set of #s is the build date for the rims and if I'm correct, they won't be rated for 80# of air.
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Old 05-20-2014, 09:06 AM   #14
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I just called General RV and he said it's odd that I have 22575r15 - e rated tires on a 5 lug wheel. He said it will be safe but 205's are general the tire size for that rim not 225's. Anyway, he said pump them up to 70psi or so. The sticker on the side of the trailer says 20575r15 with 50psi as original but someone did change to these new e rated tires. I guess I may stay at the 60 psi as they are now. Hope this will be ok.
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Old 05-20-2014, 09:07 AM   #15
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I too have e-rated tires and the mfg recommends filling them to max psi when towing.
With a triple axle, I find it turns and rides better overall at the max pressure.
I sure leave less rubber on the ground with higher pressures when turning sharp.
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